Train-control system



Feb. Z3v 1926.

G. w. nomasl TRAIN CONTROL SYSTEM FiledvAprl 8, 1925 Eihk gwwntoz MX NJe [V7.0 e

@Maui Patented Feb. 223,

PATENT QFFICE.'

GEORGE W. DODGE, 0F KNOXVILLE, TENNESSEE.

TRAIN-CONTROL SYSTEM.

Application filed April 8, 1925.

To all whom t may concern: Y

`Be it known that l, Grenen iV. Denen, a .citizen 'oi the United States,residing` at Knoxville, in the county ol' Knox and State et Tennessee,have invented certain new and useful ln'iprovements in rfram-ControlSystems, ot which the following is a specific-ation.

The invention relates to train control systems, particularly ot the typeknown as the union switch and signal system, and has :tor its object toprovide in combination with a system ot' this character indicatingmeans, preferably audible, for notifying the engineer, after he hasentered restricted territory1 that he has brought the train within thespeed limit imposed on him while in said restricted territory, and towarn him when the speed ot his train approaches the speed .limit underwhich he is' running.

A further object is to provide means whereby it' the speed of the trainreaches the speed limit or approaches too closely the speed limit, thebrakes will be automatically set and the train stopped or reduced inspeed.

A further obj ect is Ato provide in combination with the magnet valve,spaced ports carried bya slide valve controlled bythe magnet, and aspeed controlled slide valve having spaced ports, pipe connections incommunication with the timing valve and blow downV reservoir, and themain air feed pipe line, whereby, when the speed controlled valve is ina predetermined position, under the speed controlling mechanism a signalwill be given to the engineer that he is traveling at the predeterminedspeed and must not increase his speed, as an increase of speed willallow exhaust of air from the pipe, leading to the relay and protectionvalves and cause the automatic setting of the brakes.

Aw further object is to provide the speed controlled valve with spacedports, said ports being positioned whereby when the *alve is inoperative position, substantially at a predetermined speed, one of saidports will register with spaced ports in communication with a signallingdevice and the feed line, and the other port in communication with aport leading to the atmosphere, and in a position where upon a furthermoveinentof the valve a port leading to the re- Serial No. 21,600.

lay and protective valves will be uncovered. Also to provide the magnetcontrol valve with spaced ports which, when the train is in a restrictedarea or territory and the magnet in deenergized position, will registerlwith spaced ports in the timing valve and blow down reservoir pipeline, and allows a continuous exhaust from the blow down reservoir whilethe train is in restricted territory. The magnet valve has its otherport, when the valve is deenergized, in registration with spaced portsin the feed line when the train is in restricted territory. therebyallowing flow of air through the port in the speed control valve to thesignalling or indicating means within the engine cab, for operating thesignallingmeans,when the train is traveling at substantially thepredetermined speed.

lith the above and other objects in view the invention resides in thecombination and arrangement ot parts as hereinafter set forth, shown inthe drawing, described and claimed, it being understood that changes inthe precise. enil'iodiment ot' the invention may be made within thescope of what is claimed without departing from the spirit oi theinvention.

Reterring to the drawingwherein the single tigure shows a diagramn'laticview ot the device, parts being shown in section to better illustratethe same, the numeral l designates an engine axle, or any otherrotatable part ot an engine, and which axle is provided with a bevelledgear 2, which meshes with a bevelled gear 3 carried by a verticallydisposed flexible shaft 4, which operates the centrifugal governor 6through the gears 'T and S., which connect the governor to the flexibleshaft l. The centrifugal governor, during its rotation. causes the arms9 thereof to pivot outwardly incident to the centrifugal torce, and theweights l() carried thereby, and causes the rollers l1, carried by theinner ends Ot' the arms, to move forwardly in engzagement with the discl2 ot the slidable bar 13, which slidably mounted in the bearing leagainst the action oi the coiled spring l5, .vhich norn'ially forces thedisc l2 rearwardly, ther-etere it will be seen that as the speed ot theaxle l increases or diminishes the amount of movement ot the bar 18 willinblow down valve 2l will operate when the magnet valve 28 is indeenergized position Y terially n'iodifyinp; the construction thereoit,

' ot said systems.

and Without varying the normal. operations lit will also be seen thatthe control and indicating or signalling means will indicate to theengineer when he has attained the prescribed speed within the restrictedarea, and will also indicate to him that an increase oi speed willautomatically set the loi-altes, however the engineer will have a freerange ot control below the prescribed restricted speed. providing theadjusting bolts i8, it will. be seen that the valve 2l may be adjustedminutely and accurately, and at the saine time the port 41 may be placedat various distances in relation to the port elf-i in which the pipe 45is connected tor allowingv a slight range oi' movement before anautomatic operation.

The invention having been set forth what is claimed as new and usefulist* l. The combination with a train control system having a magnetvalve and a speed governor, of valve means operated by said speedgovernor and cooperating' with ports Vin communication with ports in themagnet va ve and lioiming means whereby when a Vpredetermined speed issubstantially obtained a signal will be given and upon exceeding thepredetermined speed brakes will. be set. Y

2. The combination with a train control system oi' the character setforth and having a magnet control valve, speed control mechanism, areservoir pipe line leading to a blow down valve, a feed pipe line. saidmagnet valve being provided with ports registering with ports in thereservoir pipe line and the ij'eed pipe line when the magnet isdeenergized, a speed control valve, a port carried by said speed controlvalve and registering with spaced ports in the feed pipeline at apredetermined speed, said feed pipe line terminating' in a signaling`device, a second port carried by the speed valve, a relay and protectionvalve pipe line leading to the atmosphere, said second port carried bythe speed valve registering with a port in the relay and protectionvalve pipe line and overlapping a second port in said relay andprotection valve pipe line, whereby upon an increase of speed both ot'said last named ports will register with the second mentioned port inthe speed valve.

fl. rEhe combination with a train control brake system of the characterdescribed and comprising a magnet control valve having spaced ports, aspeed governing device, of means for limiting the speed ot a train andindicating' the attainment ot substantially a predetermined speed, saidmeans compris inn' a speed control valve having;` spaced ports, a blowdown reservoir pipe line having ports ol: communication with one ot thespaced ports of the magnet valve` a iteed pipe line having` ports otcommunication with the other port of the magnet valve and ports ofcommunication with one of the ports of the speed control valve, a relayand protection valve pi io line leading to the atmosphere and havingports, one of which registers with one o'f the ports of the speedcontrol. valve at substantially a predetermined speed and the other portpositioned whereby upon an increase oi speed both oig said ports willregister with the speed control valve port.

Ll. The combination with a train control system oi the characterdescribed and comprising a speed governor and "a magnet valve, ot aspeed control valve controlled by the ojovernor, said magnet valve andspeed control valve cooperating whereliy upon the attainn'ient o'i' apredetermined speed a signal will be continuously `given and upon encceding the predetermined speed the train will be stopped.

The combination with a train control system ot the character describedcomprising a speed governor and a magnet valve and into ports ot whichvalves a feed line discharges through spaced ports, a blow downreservoir pipe line discharging into a porto't the magnet valve throughspaced ports and leading' to the blow down valve, said speed controlvalve having' its poi'ts positioned whereby upon the attainment of apredetermined speed the .teed valve line will operate a signal throughone port and upon increased speed above the predetermined speed air willbe exhausted from a relay and protection valve line.

6. The combination with a train control system o' the characterdescribed having a speed governor, ot a speed control valve cooperatingwith spaced ports of a feed valve line leading` to a signalling deviceand a re lay and protection valve line having spaced ports and leading'to the atmosphere and forming,r means whereby upon attainment ot apredetermined speed a port of the valve will register with the spacedports of the feed valve line and a port ot the speed valve will registerwith one of the ports oit the relay and protection valve line and upon afurther movement of the valve will register Vwith both ports of tlierelay und protection valve line.

7. The combination with a train control System of the characterdescribed, of a governor controlled speed controlling valve lmvingspaced ports cooperating with spaced ports in a feed Valve line and arelay and protection Valve line and forming' means whereby at apredetermined speed the feed valve line will be open and upon anincrease 10 0I" Speed the relay and protection valve line will be open.v

ln testimony Wlieieot l atlx iny signature.

GEORGE W. Denen

